Github user sameeragarwal commented on a diff in the pull request: https://github.com/apache/spark/pull/14412#discussion_r98603116 --- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala --- @@ -1131,14 +1131,47 @@ private[spark] class BlockManager( } /** + * Called for pro-active replenishment of blocks lost due to executor failures + * + * @param blockId blockId being replicate + * @param replicas existing block managers that have a replica + * @param maxReps maximum replicas needed + * @return + */ + def replicateBlock(blockId: BlockId, replicas: Set[BlockManagerId], maxReps: Int): Boolean = { + logInfo(s"Pro-actively replicating $blockId") + val infoForReplication = blockInfoManager.lockForReading(blockId).map { info => + val data = doGetLocalBytes(blockId, info) + val storageLevel = StorageLevel( + info.level.useDisk, + info.level.useMemory, + info.level.useOffHeap, + info.level.deserialized, + maxReps) + (data, storageLevel, info.classTag) + } + infoForReplication.foreach { case (data, storageLevel, classTag) => + replicate(blockId, data, storageLevel, classTag, replicas) + } + true + } + + /** * Replicate block to another node. Note that this is a blocking call that returns after * the block has been replicated. + * + * @param blockId + * @param data + * @param level + * @param classTag + * @param existingReplicas --- End diff -- Let's either document these params or just remove them
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